Improvement in electro-magnetic motors for printing-telegraphs



Y ZSheet's--SheetL L. T. LINDSEY.

Mastro-Magnetic Motors for Printing-T'legraphs, &c`.

No.136,329. f ParenfedFeb.25,1873.

Wimsses: l ncventor 2 Sheets--Sheet 2.

L. T. LINDSEY.

Electro-Maglietc Motors for Printing-TeIegraphs, &c.

No. 136,329. fly/ Patented Feb. 25,1873.

v 7W @QW-ML Attorneys,

UivITED STATES PATENT OFFICE.

.LANDY TUNSTALL LINDSEY, OF JACKSON, TENNESSEE.

IMPROVEMENT IN LECTRO-MAGNETIC MOTORS FOR PRINTINGTELEGRAPHS,&C.

Specification forming part of Letters Patent No. 136,329, dated February 25, 1873.

To all whom it may concern:

Be it known that I, LANDY TUivsTiiLL LIND- SEY, of Jackson, in the county of Madison and in the State of Tennessee, have invented certain new and useful Improvements in Electro-Magnetic Motor; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing and to the letters of reference marked thereon making a part of this specification.

This invention represents an improvement upon my patent No. 106,493, and also has some additional features, whichare new and novel in the same connection.

The reference letters and figures correspond in indicating the same parts in the diiferent figures, and will be more particularly referred to as the specification proceeds.

The toothed circuit-wheel a2 and spring a are identically the same, and likewise have the same electrical connections as described in my patent above referred to; but the magnet ofthe governor set which they control is not represented in this case. By reference to that patent it will be seen that l claim substantially the use of a toothed wheel and spring, corresponding to those above alluded to, to direct and control the current through one magnet of the governor set of my original motor, removing the other magnet of this set therefrom, and substituting a spring instead, all of which will be found more fully described therein. The present improvement on that combination consists in the re-establishment of the magnet shown to have been removed from the governor set and the addition of a spring, al, to correspondtherewith and act alternately with the spring c on the teeth of the wheel a2, for the purpose of transmitting the ycurrent through this reinstated magnet at successive intervals. This restores my motor to its original form of two magnets to each set, with only this difference, that the arrangement of the connections for directing the course of the current through the magnets of the governor set are now made by the operation of the springs a al and toothed wheel a2, instead of by the alternate contact of the lever of the propelling set with'adjusting-screws,

-as heretofore. The use of either one or two magnets in the governor set is optional. This disposes of the present invention so far as it applies as an improvement on my patent No. 106,493. Those features which are additional and take part in regulating the machine, so as to insure perfect and reliable synchronism of two or more of the instruments, will now be explained, and their novelty is here claimed. They consist in a correcting circuit-wheel, o, having a spring, u, pressing thereon, a singletoothed circuit-wheel, e, with its corresponding spring' n, which comes in contact therewith once during every revolution, in combination with an electro-magnet, M, with its armature-lever L and adj ustin g-screws t' t", and the electrical connectin g-wires communicating between them. The correcting circuit-wheel o has a section cut out of its circumference,

and is so designated from its office, which is to assist materially in insuring the synchronisni to be obtained. This synchronism is effected by sncli an arrangement of electrical connections between and acting in combination with the parts just mentioned as will cause the fastest of any number of the motors, however distantly connected, to stop at the completion of every full revolution until those slower in speed successively complete their revolutions, each halting as it completes a full revolution until the slowest of the number has also reached this point, when the impediment, viz., the breaking of their circuits, which has successively checked them, will be removed by the completion of a circuit thereby, which will liberate the several motors, as will be hereafter explained, allowing them to all start together, to be followed by a similar series of halts at the completion of every succeeding revolution so long as any one ot' the motors is not in unison of movement with all the others. The length of time in the successive halts being observed, the governor may be manipulated to give more or less speed until the synchronism has been universally obtained. In order to compel each motor to stop on the comple tion of a revolution, I remove one of the teeth from the toothed wheel a2, as showngin Fig. 3, or in full outline in Fig. 4. This interrupts the alternate series of makes and breaks in the circuit, which includes the magnet of the governor set, and effectnally stops the vibration of its armature-lever upon which the movementof the wheel a?, through the medium of the `propelling set, depends. Auxiliary assistance has, therefore, to be afforded to get across this gap, which once passed, the series of offand-on motions of the spring c with the teeth of the wheel a? will continue automatically until the gap caused by the missing tooth is again reached. To supply the deiiciency caused u by removing the tooth from the wheel a2 I employ another wheel, '6, of equal dimensions, having on its circumference only one tooth of the same size as the one removed from the wheel c2. This single-toothed wheel c is fitted on the same shaft S with the wheel c2, and immediately below it, and so adjusted that the single tooth occupies a position directly under the place from whence the tooth was removed above. This may be seen by refer.

ence to Fig. 3, the wheel a? being above and 'the wheel c with its single tooth in the position indicated beneath. The wheel e is also represented in full outline by Fig. 5.

The object of the single-toothed wheel e is, in combination with the spring u, to restore the interrupted circuit, which includes the magnet ofthe governor set. The wheels a? and e are upon the same shaft, and connected to the same pole by wire It of the battery B through the frame of the apparatus. The other pole terminates in the springs c and a by two wires leading therefrom, one of which passes from .spring a through'the armature-lever and contact-point of the governor-magnet; for, as there can be no circuit closed by the spring c when in the gap caused by the missing tooth, the circuit at this point has to be closed by the spring a on the single-toothed wheel e. It is necessary, therefore, to run two wires from the latter pole of the battery, one of which will connect with the spring c, the other with the spring n. That wire which leads to the spring c (h4) goes direct; that which leads to the spring n is in two sections; the iirst section, h2, proceeds from the' battery to the adjusting-screw t of the magnet M; the second section, h3, from the armature-lever L of the .magnet M direct to the spring a. These sections are united when the armature-lever L is held to a contact with the adjusting-screw i, by the influence ofthe magnet M, but are disunited when this armature-lever is not in such contact.

An illustration of this may be had by reference to Fig. 2 of the drawing. The spring n is supposed to be resting on the single tooth of the wheel e; awire, h1, leads from the frame which supports this wheel Vto one pole of the -battery B. From the other pole proceeds one of the sectional wire connections, h2, to the adjusting-screw i; from the armature-lever L Vproceeds the other sectional wire, h3, to the -spring a. The object in having the wire ileading from the battery B to the spring a in two sections, terminating on the adjusting screw t' and lever L, is to keep them fdisunited by the non-contact of these points until the slowest-moving motor has completed its revolution, as otherwise the circuit would experience no interruption when the spring a. was at the point where the tooth had beenremoved, as the circuit would be immediately closed through the single-toothed wheel e via spring a and this second wire h2 h3. As this wire is in two sections, however, and these can only be united'when their representative ends i and L are in contact, it follows that the instrument will remain halted until this contact is formed. This contact cannot be formed until a current passes through the. coils of the magnet M, causing it to attract the lever L to the required contact with the adjusting-screw fi, thereby closing the circuit of the battery B through the coils of the governor-magnet. The circuit in which the magnet M is included is closed by the completion of the revolution of the slowest-moving motor, which, having united the points t and L, as above shown, and closed the broken circuit of the governor-magnet, gives the auxiliary impulse necessary to help the motor beyond. the gap caused by the removed tooth, which once passed, the automatic motion is resumed until this point is again reached in the succeeding revolution.

The circuits in which the governor and prof peiling sets are included are local, and couiined to their immediate vicinity; but the circuit in which the magnet M is included is general, and must extend to and include the mag nets M of all the instruments to be operated, no matter what distance intervening. It' the distance be short, this circuit may be entirely metallic. If of any considerable length, the ground may be used for the return circuit, as in practical telegraphy. The means employed to keep this circuit broken until the slowestmoving motor has reached the point where the spring a and single-toothed wheel form contact consist in the correcting-wheel o and its spring u, in combination with the magnet M, which controls the lever L, and the electrical conductin g-wires connecting therewith. These are included in and constitute a part of the general circuit above alluded to. The wheel o and spring a must be so adjusted with reference to the wheel e that when the spring a is mount-ing the single tooth of this wheel the spring u will be simultaneously mounting the circumference of the Wheel o, the removed section portion of this latter wheel having just passed opposite to the spring, as shown in Fi g. 3. As the wheels o and springs a in the several motors employed form a part of the general circuit which includes the magnets M, so long as any one of these wheels has the removed section portion of its circumference opposite its corresponding spring this circuit remains broken and the magnets M cannot act. When, however, the removed section portion of the wheel o of the slowest moving of the motors has passed beyond the spring a, and this spring mounts the circumference ofthe wheel, the general circuit is completed, the magnets M of the several motors close coni tacts atiy and L, respectively, and, the broken circuits of the battery B being restored, an equal start from the same point in the beginning of the following revolution is given to each.

The course of this general circuit may be shown by reference to Figs. 2 andr3, which represent the essential parts of two motors, and may be` thus traced: Starting from the correcting-wheel o, in Fig. 2, ein. wire d, through battery D; thence ma wire d1 to and through the magnet M, ma wire d2 to the wheel o of Fig. 3, representing the second motor; thence from the spring' u through another magnet, M, (not shown,) cia wire d3 to the spring u of Fig. 2, which completesV the circuit. When the removed sectional portion of each of these wheels is opposite its particular spring this circuit remains broken; but as `they successively form contact, as shown in Fig. 3, they also successively close the broken portions of the circuit, and when the slowest moving of the number reaches this point the last broken link in the circuit will be united, restoring it and liberating the several stopped motors, in the manner as hereinbefore described. This check to the movement of the motor may be applied as often during ka revolution as desired by increasing the number of teeth on the single-toothed wheel e and creating gaps in the wheels c2 and o to correspond, in the manner as already described.

Synchronism is obtained by manipulating the governor so as to increase or reduce the speed. The wheel o should be insulated from its shaft, and the spring u likewise from its support, if they would otherwise be metallically connected with the other circuit-wheels and springs, to prevent conflict of currents.

This instrument, thus governed and regulated, may be adapted for printing telegraphic purposes where a reliable synchronism of movement is of vital importance, in which event the type-wheel used must have no letters on that part of its circumference opposite or corresponding to the section removed from the correcting circuit-wheel o, (see Fig. 3,) as there can be no circuit during the time this such case being made to act asy an escapement, or any escape movement'being substituted in lien thereof.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In combination with the propelling set and the governor set of an electric motor, the wheel a2, springs a, al, and electrical connecting-wires therewith for cbntrollin g the motion of the governor set, substantiallyas herein set forth.

2. The combination of the sprin gs n a, wheels e o, magnet M, lever L, adj Listing-screws t', and electrical connectin g-wires, all constructed and arranged as described, for the purpose ofsuccessively stopping the motors as they complete their revolutions, and starting them all at the same time by giving an additional impulse to the wheel a2, substantially as herein set forth.

. 3. In combination with the devices claimed in foregoing clause, a type-wheel constructed to correspond in shape with the wheel o, for the purposes herein set forth.

4. The arrangement of the ratchet movement, as described, or an escape movement in lieu thereof, in combination with the shaftv S and governing mechanism, for the purposes set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 13th day 'of May, 1872.

lVitnesses: L. T. LINDSEY.

C. L. Evitar, A. N. MARR. 

